libjpeg's a library written entirely in C which contains a widely-used implementation of a JPEG decoder, JPEG encoder and other JPEG utilities. This library's maintained by the Independent JPEG Group. The current version of the library's 6b and was released in 1998. Utilities The following utility programs are available with libjpeg: cjpeg and djpeg, for performing conversions between JPEG and some other popular image file formats. rdjpgcom and wrjpgcom, for inserting and extracting textual… (More on Libjpeg)